Well, back in the day, we used to send out unaccompanied foursomes quite regularly, as it was business entertainment and folks liked playing the assets my previous employer & Eric Bergstol own(s)(ed).
The assets were/are all solid places to play, with as much course and difficulty as you wanted depending on the tee selected. What told us how we were doing on the hospitality side of the ledger was the calls received after the unaccompanied guests went out, finished play and had their post round libation.
When the "thank you call" began " Bruce - the staff at _________, treated us like members, as guests we couldn't have asked for more", we knew all was well.
There was only one occasion in 15 years the staff rang me the next dat to say " Bruce - the guests you sent out - I don't know how to say this - but they were an issue with our members." Obviously that group never was invited back, nor did we do much business with them.